LT1/LT4 Tech 1993-1997

Noob!! car runs hot lacks power and misses

Thread Tools
 
Search this Thread
 
Old Jun 8, 2010 | 10:10 PM
  #21  
skywurz's Avatar
Thread Starter
|
Newbie
Joined: May 2010
Posts: 27
Default

original issue but nolonger overheating

so far i got ballsy and frustrated and started disconecting injectors while the car was running i found that 6, 1 and 3 change very little when i dissconnect the injectors but when i rev its more noticeable. so im thinking pluged injectors? im at a compleate loss on this. the car starts right up and idles fine and revs ok it hesitates when you step on it and when you try to drive it. lets say you put it in first on flat ground let out the clutch and let it roll then step on it nothing happends its like a tractor it spools up slow i have no codes (i did get code 18 after fussing with injectors but cleard it) other than that no codes the o2 sensors seem to be reading in the same range
 
Old Jun 13, 2010 | 08:03 PM
  #22  
skywurz's Avatar
Thread Starter
|
Newbie
Joined: May 2010
Posts: 27
Default

Ok so i did a compression check and it looks ok. i then replaced the opti and started it up the miss seems to be gone but it is even more under powered than before. i did run out of gas in the driveway while running it vapor lock? Still no codes it seems to be running normal except no power and it takes forever to spool up when you step on it. Any ideas?
 
Old Jun 13, 2010 | 08:15 PM
  #23  
craby's Avatar
April 2011 ROTM
Joined: Mar 2009
Posts: 22,007
From: Tokeland, Washington
ROTM Winner's Club
Default

check the fuel pressure.
 
Old Jun 13, 2010 | 08:16 PM
  #24  
skywurz's Avatar
Thread Starter
|
Newbie
Joined: May 2010
Posts: 27
Default

will do i will let you all know
 
Old Jun 13, 2010 | 08:21 PM
  #25  
craby's Avatar
April 2011 ROTM
Joined: Mar 2009
Posts: 22,007
From: Tokeland, Washington
ROTM Winner's Club
Default

when was the fuel filter changed last? may be a good idea, if you do change it dump the contents into a clear container and see if theres crab in there,,, like rust or water.
 
Old Jun 13, 2010 | 08:41 PM
  #26  
Camaro 69's Avatar
Senior Moderator
January 2010 ROTM Winner
Joined: Oct 2007
Posts: 18,306
From: The 'Burbs of Chicago
Default

Originally Posted by craby
when was the fuel filter changed last? may be a good idea, if you do change it dump the contents into a clear container and see if theres crab in there,,, like rust or water.
Oh cod, don't start with the crab stuffing again, it gives me a haddock!
 
Old Jun 13, 2010 | 09:14 PM
  #27  
skywurz's Avatar
Thread Starter
|
Newbie
Joined: May 2010
Posts: 27
Default

40psi on fuel system and it only drops to about 30 when I jump on it but it recovers quickly
 
Old Jun 13, 2010 | 11:24 PM
  #28  
craby's Avatar
April 2011 ROTM
Joined: Mar 2009
Posts: 22,007
From: Tokeland, Washington
ROTM Winner's Club
Default

fuel pressure is good. test the tps and the map. the only thing i can think of is the computer is getting bad info from somewhere as you are accelerating. maybe pick up a noid light for your injectors and see if the flashing increases with rpms.
 
Old Jun 13, 2010 | 11:32 PM
  #29  
skywurz's Avatar
Thread Starter
|
Newbie
Joined: May 2010
Posts: 27
Default

i know tps is good and so is the map im not sure about the O2 how many volts should i be getting after it has sat overnight and has not run? but closed loop should out rule that issue. Im gonna try putting a coil booster on it tomarrow to see if its weak spark
 

Last edited by skywurz; Jun 13, 2010 at 11:43 PM.
Old Jun 13, 2010 | 11:52 PM
  #30  
craby's Avatar
April 2011 ROTM
Joined: Mar 2009
Posts: 22,007
From: Tokeland, Washington
ROTM Winner's Club
Default

have the injectors checked. its not that much to have them cleaned, pressure and flow tested.
 



All times are GMT -5. The time now is 04:40 AM.